Does a Reddit IP ban affect everyone in your house?

Correct, and they could technically be at risk of getting their account banned if they consider those as possible alt-accounts for ban evasion too.

What if somebody at, let’s say, a Starbucks gets banned, would every costumer be at risk?
- Reddit should be able to tell by the number of different accounts that connect through an IP like that that it's not a home wifi network and treat it accordingly, the question is do they actually do that (probably cuz otherwise you'd never be able to connect through a VPN lol)
- If that account only ever logged in there, maybe? I'd think they'd be smart enough to look at the most commonly used IP address by the account(s) in question. Then again, it is reddit.
- Probably....my ban followed every device because some AITA mod was a fuckface.
- They most likely don't rely on a single metric to determine if someone is evading a ban. False-positives can happen though.
- I can’t say how they do it now, but it used to happen all of the time. A service would ban an IP that was shared, or even a range of IPs if the traffic was disruptive enough. Then the owner would have to contact the service to have their ban removed.
  I’ve run into IP ban messages from both hotel WiFi and from VPN addresses.

Yes. I was IP banned from Reddit and my wife’s account got banned as well on her devices (I never once used her devices to log into my account).

This can be circumvented with a vpn, but why bother. Reddit is a toxic site that is meant to show you ads and get you enraged so you engage.

I still miss it. It was a good entertaining time killer that has no replacement so far. I was in a lot of music and guitar subs that were fun to interact in
- For me I found that it was full of people who desperately wanted to be right about everything.
  I was banned from the 3Dprinting sub after posting a print in front of a 3D printer that was not the subreddit’s recommended printer and after I was called out for having “the wrong printer” I accused the multiple users of acting like they were in a cult. That resulted in a ban. Even my hobby subs were filled with unnecessary negativity.
  There is much less content here but I fill it with as much interesting content I can because it’s friendlier here.
Or by browsing from your data plan, or refreshing your ip address. Unless you pull a static ip for which you pay for a dynamic one is going to change. Just power cycle the modem and it'll likely change. Sometimes it takes a few tries or leave it disconnected for a bit.
- Not worth it

I'm pretty sure they focus on other ways like device ID; IPs are problematic since they're shared and recycled a lot.

In general, ISP would sell a fixed IP adress as a fancy option, just unplug/replug your modem a couple of time and you'll get a new IP. As very few ISP don't offer IP6 yet another fancy option they have to pool their IP adresses among their customer

This make IP ban pretty unreliable, and there is way better way to identify a single user even in private browsing

One does not simply "block fingerprinting". Fingerprinting is incredibly complicated and very hard to avoid. You need VPN, Browser with no extentions and fixed windowsize (tor or mullvad), frequent cookie deletion, even the installed fonts/language packs can give them identifiers...
EFF has a good test which tests your browser
- If you have JavaScript enabled all this is useless. So add "disable JS" onto the list.
Its not machine specific, they can see very little about your machine. It's most likely your browser. The cookies can give you away.
My alts work just fine with a VPN after being banned.
Now that I recall, I started an account using cellular and it was banned hours later, still on cellular.

Not sure if they IP ban you because it's not reliable. Most internet providers don't give you a static IP, you get a new one every time you connect to the internet.

I've been IP banned before from some Counter Strike (1.6) servers back in the day because they though I was cheating (I just learned the AK's recoil pattern), all I had to do was restart the router to play again.

I recently visited a forum for the first time and I wanted to comment but I couldn't because I was IP banned. Probably because someone trolled there with the IP that I ended up receiving.

Me and my friends got banned from an online game because we logged in from school computers and sent each other resources. They thought they were one person's alt accounts, which was forbidden. This was before wifi became commonplace so I guess they assumed everyone used their own internet.

I suspect that your IP is just one data point that they use to try to identify you if they do this sort of thing. Your browser (or their app) provides tons of information like screen resolution, device id, extension list, plugged in device list etc. These can identify you quite accurately.

I would think so, unless you used a VPN or your IP changed (or if you used IPv6 I think)

Normally yes, but they may only do it for the "evil people using a hardened Browser" as they will recognize everyone of those Chrome, Edge or Safari users perfectly. Along with Opera, Vivaldi, Samsung Internet etc

Your IP address changes every 24h, doesnt it? How are IP bans effective at all?
- Maybe yours does, but that's not universal in the slightest

Well, not to put too fine a point on it, but it has users and content.

There is only going to be one IP address per house in most cases. If you check https://www.whatismyip.com/ on any computer in the same household it should come up with the same result.